Set 13 - Round 2

Chemistry Multiple Choice

If a barometer were constructed using water instead of mercury, by what factor would the height of the mercury barometer be multiplied to give the height of the water barometer?

13.6

Chemistry Short Answer

To the nearest degree Celsius, what is the boiling point at standard pressure of a 2-molal solution of urea in water?

101

Physics Short Answer

If a sound wave traveling in air has a frequency of 5,000 hertz, how far, in centimeters, does the wave travel in a single period?

6.8

Physics Short Answer

Consider a solid spherical conductor that has a small spherical cavity in the center. You place an excess charge on the conductor and wait for it to reach equilibrium. Identify all of the following three places that some of the excess charge can be found:

1) Surface of the conductor
2) Surface of the cavity
3) Between the surfaces of the conductor and cavity

1) Surface of the conductor

Energy Short Answer

Fermi National Accelerator Lab scientists, as a part of the SENSEI collaboration, are trying to detect dark matter particles with specialized “skipper” CCDs. CCds are composed of what semiconductor element?

Silicon

Energy Short Answer

Scientists at Ames Lab are studying the formation of alumina under various condictions. What is the Chemical Formula of alumina?

AL203

Biology Short Answer

What is the general term for metabolic reactions that release energy by breaking down complex molecules?

Catabolic

Biology Short Answer

What plant ground tissue type performs a majority of the metabolic functions of a plant and plays a relatively small role in structural support?

Parenchyma

Math Multiple Choice

Which of the following cannot be the rightmost two digits, in order, of the square of an integer?

27

Math Short Answer

What is the average of the first 10 prime numbers?

12.9

Earth and Space Multiple Choice

Which of the following tectonic plates is the largest?

Pacific

Earth and Space Short Answer

An atom of uranium-239 undergoes two beta-minus decays and four alpha decays. What is the mass number of the product?

222

Chemistry Short Answer

Identify all of the following three compounds that contain both covalent and ionic bonds:

1) Phosphorus oxychloride
2) Ammonium sulfate
3) Potassium chloride

2) Ammonium sulfate

Chemistry Short Answer

A weak acid has a Ka of 1.6 times ten to the negative fifth. Assuming that dissociation is small, what is the percent dissociation of one-molar solution of this acid in water?

0.4

Physics Short Answer

If the half-life of a radioscope is 25,000 years, what fraction of an original sample will remain after 100,000 years?

One Sixteenth

Physics Short Answer

At a bottling factory, a robotic arm automatically raises a 4000-newton palette up 6 meters to load it into a canning machine every 5 minutes. IN watts, how much average power is required to operate the robotic arm?

80

Energy Short Answer

Scientists at Lawrence Berkely National Lab have been studying a silencer protein known as PRC2. PRC2 silences genes by chemically modifying what proteins around which DNA is wound?

Histone

Energy Short Answer

Scientists at Oak Ridge National Lab are studying alloys composed of rare earth elements. Identify all of the following three metals that may be examined in these studies: 1) Cerium; 2) Cesium; 3) Tellurium

Cerium

Math Multiple Choice

The function y = f of x has zeros at 4 and 12. If its graph is vertically stretched using a factor of 2, what are the zeros of the result?

4 and 12

Math Short Answer

What is the ratio of the volume of a sphere of diameter π to the volume of a cube with edge length π

π/6